SOLUTION: I am working on solving the systems of equations by elimination method.
{-x+18y=20 and x+18y=25}. Once these two equations are added together, I come up with 36y=45. The next st
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-> SOLUTION: I am working on solving the systems of equations by elimination method.
{-x+18y=20 and x+18y=25}. Once these two equations are added together, I come up with 36y=45. The next st
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Question 515614: I am working on solving the systems of equations by elimination method.
{-x+18y=20 and x+18y=25}. Once these two equations are added together, I come up with 36y=45. The next step is to solve for y by dividing 36y=45. My answer is y=5/4. So far, so good.
However, I am having trouble finding x. I rewrite the above equations and substitute 5/4 in the first equation, -x+18y=20. I substitute 5/4 for y and the answer is x-5/2. I need to know "how" that answer is worked out.
Thanks. Answer by mananth(16946) (Show Source):
